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      1 /*
      2  * Copyright (C) 2010 Apple Inc. All rights reserved.
      3  *
      4  * Redistribution and use in source and binary forms, with or without
      5  * modification, are permitted provided that the following conditions
      6  * are met:
      7  * 1. Redistributions of source code must retain the above copyright
      8  *    notice, this list of conditions and the following disclaimer.
      9  * 2. Redistributions in binary form must reproduce the above copyright
     10  *    notice, this list of conditions and the following disclaimer in the
     11  *    documentation and/or other materials provided with the distribution.
     12  *
     13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
     14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
     15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
     17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
     23  * THE POSSIBILITY OF SUCH DAMAGE.
     24  */
     25 
     26 #include "config.h"
     27 #include "JSNPMethod.h"
     28 
     29 #include "JSNPObject.h"
     30 #include <JavaScriptCore/Error.h>
     31 #include <JavaScriptCore/FunctionPrototype.h>
     32 #include <JavaScriptCore/JSGlobalObject.h>
     33 #include <WebCore/JSHTMLElement.h>
     34 #include <WebCore/JSPluginElementFunctions.h>
     35 #include <WebCore/NotImplemented.h>
     36 
     37 using namespace JSC;
     38 using namespace WebCore;
     39 
     40 namespace WebKit {
     41 
     42 const ClassInfo JSNPMethod::s_info = { "NPMethod", &InternalFunction::s_info, 0, 0 };
     43 
     44 JSNPMethod::JSNPMethod(ExecState* exec, JSGlobalObject* globalObject, const Identifier& name, NPIdentifier npIdentifier)
     45     : InternalFunction(&exec->globalData(), globalObject, createStructure(exec->globalData(), globalObject->functionPrototype()), name)
     46     , m_npIdentifier(npIdentifier)
     47 {
     48     ASSERT(inherits(&s_info));
     49 }
     50 
     51 static EncodedJSValue JSC_HOST_CALL callMethod(ExecState* exec)
     52 {
     53     JSNPMethod* jsNPMethod = static_cast<JSNPMethod*>(exec->callee());
     54 
     55     JSValue thisValue = exec->hostThisValue();
     56 
     57     // Check if we're calling a method on the plug-in script object.
     58     if (thisValue.inherits(&JSHTMLElement::s_info)) {
     59         JSHTMLElement* element = static_cast<JSHTMLElement*>(asObject(thisValue));
     60 
     61         // Try to get the script object from the element
     62         if (JSObject* scriptObject = pluginScriptObject(exec, element))
     63             thisValue = scriptObject;
     64     }
     65 
     66     if (thisValue.inherits(&JSNPObject::s_info)) {
     67         JSNPObject* jsNPObject = static_cast<JSNPObject*>(asObject(thisValue));
     68 
     69         return JSValue::encode(jsNPObject->callMethod(exec, jsNPMethod->npIdentifier()));
     70     }
     71 
     72     return throwVMTypeError(exec);
     73 }
     74 
     75 CallType JSNPMethod::getCallData(CallData& callData)
     76 {
     77     callData.native.function = callMethod;
     78     return CallTypeHost;
     79 }
     80 
     81 } // namespace WebKit
     82